KR20110109523A - Power-steering pump having tolerance ring - Google Patents

Power-steering pump having tolerance ring Download PDF

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Publication number
KR20110109523A
KR20110109523A KR1020100029298A KR20100029298A KR20110109523A KR 20110109523 A KR20110109523 A KR 20110109523A KR 1020100029298 A KR1020100029298 A KR 1020100029298A KR 20100029298 A KR20100029298 A KR 20100029298A KR 20110109523 A KR20110109523 A KR 20110109523A
Authority
KR
South Korea
Prior art keywords
power steering
tolerance ring
steering pump
rotor
housing
Prior art date
Application number
KR1020100029298A
Other languages
Korean (ko)
Inventor
서보민
이영두
정병국
Original Assignee
한국델파이주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 한국델파이주식회사 filed Critical 한국델파이주식회사
Priority to KR1020100029298A priority Critical patent/KR20110109523A/en
Publication of KR20110109523A publication Critical patent/KR20110109523A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D3/00—Steering gears
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Abstract

The present invention relates to a power steering pump for supplying fluid to a power steering device of a vehicle. A power steering pump having a tolerance ring according to an embodiment of the present invention is a power steering pump including a tolerance ring for fixing a bearing in which a drive shaft is installed to a housing, wherein the tolerance ring is inserted between the bearing and the housing. A cylindrical insertion portion, an inner jaw protruding from the inner circumference of the insertion portion so that the bearing inserted into the insertion portion is extended, an outer jaw protruding from the outer circumference of the insertion portion and covering the housing, and the inner jaw and the outer portion And an incision for cutting the jaw and the insert together. Therefore, it is possible to prevent the vibration to improve the durability of the power steering pump as well as to reduce the noise.

Description

Power-steering pump having tolerance ring

The present invention relates to a power steering pump for supplying fluid to a power steering device of a vehicle.

In general, the vehicle is equipped with a power steering device that can steer the vehicle with little force. The power steering device is equipped with an electric motor or a hydraulic device to increase the maneuverability of the handling handled by the driver. Since the power steering device using the electric motor is expensive to manufacture, most vehicles have a hydraulic power steering device. It is used.

On the other hand, the power steering device is configured to include a steering gear for converting the rotational force of the handle into a linear motion, a hydraulic cylinder provided on the side of the steering gear, a power steering pump for supplying a fluid to the hydraulic cylinder, a reservoir for storing the fluid.

Among these, the power steering pump is an important component for supplying the fluid stored in the reservoir to the hydraulic cylinder and returning the fluid supplied to the hydraulic cylinder back to the reservoir.

Conventional power steering pump is a shaft that is rotated by receiving the power of the engine, the housing through which the shaft is installed, a rotor coupled to the shaft and rotates with the shaft, vanes that are radially projected by the rotational force of the rotor, and And a cam ring having a cam hole positioned to guide the rotor to be positioned therein and guide the vane from the rotor.

In the conventional power steering pump configured as described above, as the rotor rotates, the vanes are contacted by the centrifugal force on the inner circumference of the cam hole, and the fluid stored in the reservoir is introduced into the housing as the space between the vanes and the cam holes is contracted and enlarged. The introduced fluid supplies the stored fluid of the reservoir to the hydraulic cylinder in the form of being discharged to the discharge port formed in the housing again.

At this time, a bearing is inserted between the housing and the rotating shaft to reduce the friction force, and a retainer ring supporting the side of the bearing is fixed to the housing to fix the bearing.

However, in the conventional power steering pump, the bearing swings when the shaft rotates due to the dimensional tolerance for installing the retainer ring and the dimensional tolerance between the bearing and the housing, which causes noise and further damages the bearing. There was a problem that the power steering pump is broken.

On the other hand, the rotor coupled to the shaft also has a problem that the vibration occurs due to the dimensional tolerance to reduce the durability of the power steering pump, causing noise.

The present invention is to solve the problems described above, the problem to be solved by the present invention is to reduce the spacing caused by the dimensional tolerance between the housing and the bearing, and between the rotor and the drive shaft, power steering pump It is to provide a power steering pump having a tolerance ring that can increase the durability and reduce noise.

A power steering pump having a tolerance ring according to an embodiment of the present invention for achieving the above object is a power steering pump including a tolerance ring for fixing a bearing in which a drive shaft is installed to a housing, wherein the tolerance ring is the above-mentioned. A cylindrical insertion portion inserted between a bearing and the housing, an inner jaw protruding from an inner circumference of the insert portion so that the bearing inserted into the insert portion spans, an outer jaw protruding from an outer circumference of the insert portion and covering the housing, And an incision that cuts the inner jaw and the outer jaw and the insert together.

The inner jaw and the outer jaw may be formed at the side end of the insertion portion.

According to another embodiment of the present invention, a power steering pump having a tolerance ring includes a rotor having a plurality of vanes which are radially mounted, a drive shaft installed through the rotor, and a tolerance press-in between the rotor and the drive shaft. A power steering pump including a ring, wherein the tolerance ring has a cylindrical insertion portion inserted between the rotary shaft and the rotor, an outer jaw protruding from the outer periphery of the insertion portion, and covering the rotor, and the insertion portion and the outer portion. An incision that cuts the jaw together.

The rotation shaft and the rotor may be meshed with each other, and the insertion part may be formed in a shape corresponding to a shape in which the rotation shaft and the rotor are meshed with each other.

The outer jaw may be formed at the side end of the insertion portion.

According to the present invention, it is possible to press the tolerance ring, which reduces the gap between the bearing and the housing, and between the drive shaft and the rotor, to securely fix it, thereby preventing noise from vibration and improving durability of the power steering pump. It can be effected.

1 is a side cross-sectional view of a power steering pump with a tolerance ring in accordance with one embodiment of the present invention.
2 is a front view of a power steering pump with a tolerance ring in accordance with one embodiment of the present invention.
3 is a perspective view illustrating a tolerance ring of a power steering pump having a tolerance ring according to an embodiment of the present invention.
4 is a side cross-sectional view of a power steering pump with a tolerance ring in accordance with another embodiment of the present invention.
5 is a rear view of the cover plate of the power steering pump provided with a tolerance ring according to another embodiment of the present invention.
6 is a perspective view showing a tolerance ring of a power steering pump having a tolerance ring according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, the power-steering pump 100 according to the embodiment of the present invention supplies a fluid stored in a reservoir in which a fluid is stored to a hydraulic cylinder of a power-steering gear. And return the fluid supplied to the hydraulic cylinder back to the reservoir.

As shown in FIG. 1, the power steering pump 100 according to an embodiment of the present invention may include a drive shaft 110. The drive shaft 110 is rotated by receiving the driving force of the engine. On the other hand, one side of the drive shaft 110 may be coupled to the pulley (not shown, the pulley) that receives the driving force of the engine, the other side is coupled to the rotor 120, the rotor 120 to be described below to rotate the rotor 120 You can.

In addition, a plurality of teeth 111 may be formed in a circumferential direction so that the rotor 120 of the drive shaft 110 is coupled, that is, the other side of the drive shaft 110 to be engaged with the rotor 120. At this time, it is a matter of course that the groove 120 of the shape corresponding to the tooth 111 is formed so that the rotor 120 is meshed with the tooth 111.

The power steering pump 100 according to an embodiment may include a rotor 120. The rotor 120 has a shaft hole 121 in which a drive shaft 110 is installed at the center thereof, and a drive shaft 110 is coupled to the shaft hole 121 to drive the shaft 110 and the rotor 120. Can rotate together. In addition, a plurality of vane insertion grooves 123 are formed radially in the rotor 120, and each vane insertion groove 123 may be installed so that vanes 125 having a plate shape may be circulated in the circumferential direction. (See Figure 5).

The power steering pump 100 according to an embodiment may include a cam ring 130. An oval hollow 131 may be formed at the center of the cam ring 130. On the other hand, the rotor 120 is located in the hollow 131 of the cam ring 130, the vane 125 is radially developed by the centrifugal force during the rotation of the rotor 120, the deployed vane 125 is the cam ring 130 It may be configured to emerge from the groove formed in the rotor 120 along the inner circumference of the hollow 131 formed in the).

The power steering pump 100 according to an embodiment may include a housing 140. The housing 140 is installed through the drive shaft 110 so as to be rotatable, and a bearing seating groove 141 in which a bearing 170 for supporting the drive shaft 110 is installed is formed at one side thereof, and at the other side thereof. A fluid inflow space 143 into which the fluid is introduced may be formed.

In addition, an inlet 145 through which the fluid stored in the reservoir may be introduced into the fluid inlet space 143 may be formed in the housing 140, and an outlet 149 through which the fluid is discharged by the vane 125 may be formed. Can be. On the other hand, the housing 140 may be formed with a bore 147 in which the pressure control valve 150 is installed, and the discharge port 149 is formed in the bore 147 to discharge the fluid discharged by the vanes 125. It may be configured to flow out through the control valve 150.

On the other hand, the cam ring 130 may be located in the inlet space in which fluid flows into the housing 140. One side of the cam ring 130 may be pressed by the pressure plate 160 supported by the elastic force of the spring 161 in the housing 140.

The power steering pump 100 according to an embodiment may include a cover plate 165. The cover plate 165 may seal the fluid inflow space 143 formed in the housing 140 and support the other side of the cam ring 130 supported by the pressure plate 160.

The power steering pump 100 according to an embodiment may include a pressure control valve 150. The pressure regulating valve 150 is installed in the bore 147 formed in the housing 140 and is configured to open only when the fluid discharged by the vane 125 is greater than or equal to a predetermined pressure, so that the pressure of the fluid discharged from the pump 100 is increased. Can be adjusted.

As illustrated in FIGS. 2 and 3, the power steering pump 100 according to an embodiment may include a tolerance ring 180. The tolerance ring 180 is inserted between the housing 140 and the bearing 170 in which the drive shaft 110 is installed to prevent the bearing 170 from being detached from the housing 140 and at the same time as the housing 140. The play between the bearings 170 can be reduced. That is, the tolerance ring 180 is press-fitted between the housing 140, more specifically, between the bearing seating groove 141 and the bearing 170, and the clearance generated between the housing 140 and the bearing 170 due to the dimensional tolerance. Can be reduced.

The tolerance ring 180 may have a cylindrical shape and may include an inner jaw 183, an outer jaw 182, an insertion part 181, and an incision 184. Insertion portion 181 is inserted between the housing 140 and the bearing 170, more specifically, the inner peripheral surface of the insertion portion 181 is in contact with the outer peripheral surface of the bearing 170, the outer peripheral surface of the insertion portion 181 is the housing It may be inserted to contact the inner circumferential surface of the bearing seating groove 141 formed in the (140).

The inner jaw 183 may protrude inwardly from the inner circumferential surface of the insertion portion 181 so that the bearing 170 positioned on the inner circumferential surface of the insertion portion 181 may span. That is, the outer end of the bearing 170 seated in the bearing seating groove 141 may be spread over the inner jaw 183 to prevent the bearing 170 from being separated from the housing 140.

On the other hand, the outer jaw 182 is formed to protrude outward from the outer circumferential surface of the insertion portion 181 is covered over the outer end of the bearing seating groove 141 formed in the housing 140, the tolerance ring 180 flows in the housing 140 Can be prevented. In addition, the outer jaw 182 and the inner jaw 183 may be formed at any one end of the insertion portion 181, the insertion portion 181 may be formed along the circumferential direction.

In addition, the cutout 184 may be formed to cut the inner jaw 183, the outer jaw 182, and the insertion part 181 together. On the other hand, by forming the cutout 184 in the tolerance ring 180, the elastic force of the tolerance ring 180 can be generated, the diameter of the tolerance ring 180 can be expanded and reduced, so that the housing 140 and the bearing 170 When the tolerance ring 180 is press-fitted in between, it can be easily pushed in and can generate a more firm support force.

The operation and effect between the above-described respective constitutions will be described.

When the drive shaft 110 is rotated by the driving force to the engine, the rotor 120 rotates, and the vanes 125 are radially developed by the rotation of the rotor 120 to open the hollow 131 formed in the cam ring 130. Accordingly, vanes 125 emerge from the rotor 120 and generate pressure. At this time, the fluid stored in the reservoir flows into the fluid inlet space 143 formed in the housing 140 to the inlet 145 by the pressure generated, and the fluid is discharged to the discharge port 149. Here, the fluid discharged to the discharge port 149 is controlled by the pressure control valve 150 is configured so that the fluid is supplied to the cylinder of the power steering gear only when a predetermined pressure or more.

Meanwhile, the tolerance ring 180 is press-fitted between the bearing 170 and the housing 140 to reduce the play generated between the bearing 170 and the housing 140, thereby rotating the drive shaft 110 as in the related art. Due to the time dimension tolerance, the bearing 170 may be prevented from shaking in the housing 140.

Therefore, by reducing the shaking of the bearing 170 when the drive shaft 110 rotates, it is possible to increase the durability of the power steering pump 100 as well as to reduce the noise.

Hereinafter, a power steering pump 100 having a tolerance ring 190 according to another embodiment of the present invention will be described. The power steering pump 100 having the tolerance ring 190 according to another embodiment of the present invention has the same configuration as that of one embodiment, but is characterized in the tolerance ring 190.

On the other hand, in the other embodiment the same configuration as the one embodiment and the same reference numerals, and the detailed description thereof is the same as the one embodiment and will be omitted.

As shown in FIGS. 4 to 6, the tolerance ring 190 according to another embodiment may be press-fitted between the drive shaft 110 and the rotor 120. The tolerance ring 190 may include an outer jaw 192, an insertion part 191, and an incision 14. The insertion part 191 may be formed in a cylindrical shape and inserted between the drive shaft 110 and the rotor 120. More specifically, the outer circumferential surface of the inserting portion 191 contacts the inner circumferential surface of the shaft hole 121 in which the drive shaft 110 is installed, and the inner circumferential surface of the inserting portion 191 contacts the outer circumferential surface of the drive shaft 110. Can be.

In addition, the insertion portion 191 has a tooth 111 formed in the drive shaft 110 so that the drive shaft 110 and the rotor 120 are engaged, and the drive shaft 110 is formed in the rotor 120 with the tooth 111. When the groove is formed in a corresponding shape, the groove may be formed in a shape corresponding to the groove formed in the teeth 111 and the rotor 120 of the drive shaft 110. That is, the shaft circumferential groove 191a into which the teeth 111 of the drive shaft 110 are inserted is formed in the inner circumferential surface of the insertion part 191, and is coupled to the groove formed in the rotor 120 on the outer circumferential surface of the insertion part 191. The rotor coupling protrusion 191b may be formed.

On the other hand, when the drive shaft 110 and the rotor 120 is configured to be engaged, if the thickness of the insertion portion 191 is thin, as in another embodiment of the present invention, the insertion portion 191 is as if the shape of the wave in the circumferential direction It may be formed in the same shape as.

The outer jaw 192 may protrude outward from the outer circumferential surface of the insertion part 191 to cover the outer surface of the rotor 120 to prevent the tolerance ring 190 from flowing in the rotor 120. On the other hand, the outer jaw 192 may be formed along the circumference of the insertion portion 191, it may be formed on any one side end of the insertion portion 191.

In addition, the cutout 194 may be formed to cut the insertion part 191 and the outer jaw 192 together. As the cutout 194 is formed in the tolerance ring 190, the tolerance ring 190 may have elastic force, and thus the diameter of the tolerance ring 190 may be enlarged and reduced.

The power steering pump 100 having the tolerance ring 190 according to another embodiment configured as described above presses the tolerance ring 190 between the rotor 120 and the drive shaft 110, thereby providing a rotor 120 as in the related art. And the gap that can be generated due to the dimensional tolerance between the drive shaft 110 can be reduced.

Therefore, it is possible to prevent shaking between the drive shaft 110 and the rotor 120 when the drive shaft 110 is rotated, thereby improving durability of the power steering pump 100 and preventing noise. .

Meanwhile, the tolerance ring 180 according to an embodiment of the present invention and the tolerance ring 190 according to another embodiment may be configured together in one power steering pump 100.

Although the embodiments of the present invention have been described above, the scope of the present invention is not limited thereto, and it is recognized that the present invention is easily changed and equivalent by those skilled in the art to which the present invention pertains. Includes all changes and modifications to the scope of the matter.

100: power steering pump 110: drive shaft
111: tooth 120: rotor
121: shaft hole 123: vane insertion groove
125: vane 130: cam ring
131: hollow 140: housing
141: bearing seating groove 143: fluid inlet space
145: inlet 147: bore
149: outlet 150: pressure regulating valve
160: pressure plate 161: spring
165: cover plate 170: bearing
180, 190: tolerance ring 181, 191: insertion portion
182,192: outer jaw 183: inner jaw
184,194: incision

Claims (5)

A power steering pump including a tolerance ring for fixing a bearing in which a drive shaft is installed to a housing,
The tolerance ring is
A cylindrical insert inserted between the bearing and the housing,
An inner jaw protruding from an inner circumference of the insert so that the bearing inserted into the insert is spanned;
An outer jaw protruding from an outer circumference of the insertion portion and covering the housing, and
And a tolerance ring including an incision that cuts the inner jaw and the outer jaw and the insert together. In claim 1,
The tolerance ring of the power steering pump is formed on the side end of the inner jaw and the outer jaw. A power steering pump including a rotor provided with a plurality of vanes radially mounted, a drive shaft installed through the rotor, and a tolerance ring press-fitted between the rotor and the drive shaft.
The tolerance ring is
A cylindrical insertion portion inserted between the rotation shaft and the rotor,
An outer jaw protruding from the outer circumference of the insertion part and covering the rotor, and
A power steering pump having a tolerance ring including an incision that cuts the insertion part and the outer jaw together. 4. The method of claim 3,
The rotation shaft and the rotor is engaged, and the insertion portion is a power steering pump having a tolerance ring is formed in a shape corresponding to the shape in which the rotation shaft and the rotor is engaged. 4. The method of claim 3,
The outer jaw is a tolerance ring of the power steering pump is formed at the side end of the insertion portion.
KR1020100029298A 2010-03-31 2010-03-31 Power-steering pump having tolerance ring KR20110109523A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100029298A KR20110109523A (en) 2010-03-31 2010-03-31 Power-steering pump having tolerance ring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100029298A KR20110109523A (en) 2010-03-31 2010-03-31 Power-steering pump having tolerance ring

Publications (1)

Publication Number Publication Date
KR20110109523A true KR20110109523A (en) 2011-10-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020100029298A KR20110109523A (en) 2010-03-31 2010-03-31 Power-steering pump having tolerance ring

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9527523B2 (en) 2014-06-23 2016-12-27 Mando Corporation Power transmission device of electric power steering apparatus
KR20200021653A (en) * 2018-08-21 2020-03-02 현대자동차주식회사 Power steering pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9527523B2 (en) 2014-06-23 2016-12-27 Mando Corporation Power transmission device of electric power steering apparatus
KR20200021653A (en) * 2018-08-21 2020-03-02 현대자동차주식회사 Power steering pump

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